PMMA Demonstrated Higher Elastic Modulus and Nanohardness Compared with Polyamide Denture Base Materials

Abstract

The elastic modulus and nanohardness of denture bases may be different based on the type of material. The purpose of this study was to compare the elastic modulus and nanohardness of polyamide and polymethyl methacrylate (PMMA) denture base materials. Three polyamide denture base materials (Valplast, Lucitone FRS, and Thermoplastic Comfort System (TCS)) and one Polymethyl methacrylate (PMMA,Triplex Hot) denture base material (n=10) were evaluated to compare their elastic modulus and nanohardness values using an ultramicroindentation system (UMIS 2000; CSIRO, Lindfield, Australia). The data were statistically analyzed using one-way ANOVA, followed by Tukey HSD and Tamhane’s post hoc tests (α=.05). The elastic modulus and nanohardness of PMMA were significantly higher compared to the polyamide groups (P<.05). All the materials showed significant differences in each of their elastic modulus and nanohardness (P<.05). The values of nanohardness and elastic modulus of each group were as follows: Triplex Hot > Lucitone FRS > Valplast > TCS. The elastic modulus and nanohardness values varied among the polyamide denture base materials. PMMA showed higher elastic modulus and nanohardness than the polyamide. A strong positive correlation existed between elastic modulus and nanohardness of the denture bases tested (R2 = 0.979, P<.05).

The Relationship of Modulus of Elasticity and Micro-Hardness of Denture Bases to Pressure Transmission under the Thermoplastic Nylon Denture Base

“…The result of previous study showed the PMMA modulus of elasticity was 5,88 ± 0,2 GPa and the hardness was 0,27 ± 0,01 GPa [12]. Modulus of elasticity in TCS ® was 1,9 ± 0,1 GPa and the hardness was 0,09 GPa [16,17]. Modulus of elasticity in Biotone ® was 1340 ± 50 MPa [18].…”

Knowledge and Applicational use of Modified Monomer Acrylic Denture Base Resin among Dental Practitioners: A Survey

“…Advances in polymer science have resulted in innovative polymers with higher impact strength and fatigue resistance, high-impact polymers and fiber-reinforced polymers, for example [5]. Inorganic fillers such as metallic oxides, fluorinated glass fillers, hydroxyapatite whiskers, zirconia, and carbon/graphite, aramid, ultra-high modulus polyethylene, nylon, and jute are used to modify the polymer [2,6]. In the dental literature, there are reviews of investigations on polymeric alterations.…”